Concrete Filled Steel Tube Section#
[4]:
import opstool
Ec = 3.45E7
Es = 2.0E8
Nus = 0.3
Nuc = 0.2
tube_d = 0.02
steel_mat = opstool.add_material(name='steel', elastic_modulus=Es, poissons_ratio=Nus)
conc_mat = opstool.add_material(
name='conc', elastic_modulus=Ec, poissons_ratio=Nuc)
all_ = opstool.add_circle(xo=[0, 0], radius=0.75)
conc = opstool.add_circle(xo=[0, 0], radius=0.75 - tube_d)
tube = all_ - conc
conc.material = conc_mat
tube.material = steel_mat
sec = opstool.SecMesh()
sec.assign_group(dict(tube=tube, conc=conc))
sec.assign_mesh_size(dict(tube=0.1, conc=0.2))
sec.assign_group_color(dict(tube="green", conc="orange"))
sec.assign_ops_matTag(dict(tube=1, conc=2))
sec.mesh()
sec_props = sec.get_sec_props(
Eref=Ec, display_results=True, plot_centroids=False)
sec_props2 = sec.get_frame_props(
Eref=Ec, display_results=True)
# sec.rotate(45)
sec.view(fill=True, engine='p', save_html=None, on_notebook=True)
Section Properties ┏━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓ ┃ Symbol ┃ Value ┃ Definition ┃ ┡━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┩ │ A │ 2.204E+00 │ Cross-sectional area │ │ Asy │ 1.813E+00 │ Shear area y-axis │ │ Asz │ 1.813E+00 │ Shear area z-axis │ │ centroid │ (-5.052E-17, -1.497E-17) │ Elastic centroid │ │ Iy │ 3.676E-01 │ Moment of inertia y-axis │ │ Iz │ 3.676E-01 │ Moment of inertia z-axis │ │ Iyz │ 2.228E-18 │ Product of inertia │ │ Wyt │ 4.902E-01 │ Section moduli of top fibres y-axis │ │ Wyb │ 4.902E-01 │ Section moduli of bottom fibres y-axis │ │ Wzt │ 4.902E-01 │ Section moduli of top fibres z-axis │ │ Wzb │ 4.902E-01 │ Section moduli of bottom fibres z-axis │ │ J │ 6.010E-01 │ Torsion constant │ │ phi │ 0.000E+00 │ Principal axis angle │ │ mass │ 1.760E+00 │ Section mass │ │ rho_rebar │ 0.000E+00 │ Ratio of reinforcement │ └───────────┴──────────────────────────┴────────────────────────────────────────┘
Frame Section Properties ┏━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓ ┃ Symbol ┃ Value ┃ Definition ┃ ┡━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┩ │ A │ 2.204E+00 │ Cross-sectional area │ │ centroid │ (-5.052E-17, -1.497E-17) │ Elastic centroid │ │ Iy │ 3.676E-01 │ Moment of inertia y-axis │ │ Iz │ 3.676E-01 │ Moment of inertia z-axis │ │ Iyz │ 2.228E-18 │ Product of inertia │ │ Wyt │ 4.902E-01 │ Section moduli of top fibres y-axis │ │ Wyb │ 4.902E-01 │ Section moduli of bottom fibres y-axis │ │ Wzt │ 4.902E-01 │ Section moduli of top fibres z-axis │ │ Wzb │ 4.902E-01 │ Section moduli of bottom fibres z-axis │ │ J │ 6.010E-01 │ Torsion constant │ │ phi │ 0.000E+00 │ Principal axis angle │ │ mass │ 1.760E+00 │ Section mass │ │ rho_rebar │ 0.000E+00 │ Ratio of reinforcement │ └───────────┴──────────────────────────┴────────────────────────────────────────┘